namespace AtCoder;

#nullable enable

using System.Numerics;

class UnionFind
{
    (int parent, int edgeCount)[] Verticals { get; set; }
    bool EnabledUndo { get; init; }
    Stack<(int v, (int parent, int edges))> Histories { get; init; }

    public UnionFind(int verticals, bool enableUndo = false)
    {
        Verticals = new (int, int)[verticals];
        for (int i = 0; i < verticals; i++) Verticals[i] = (-1, 0);
        Histories = new();
        EnabledUndo = enableUndo;
    }

    public int Union(int x, int y)
    {
        (x, y) = (Find(x), Find(y));
        var (sx, sy) = (Size(x), Size(y));
        if (sx < sy) (x, y, sy) = (y, x, sx);
        var (nx, ny) = (Verticals[x], Verticals[y]);
        Histories.Push((x, nx));
        Histories.Push((y, ny));
        if (x == y) nx.edgeCount += 1;
        else
        {
            ny.parent = x;
            nx.parent -= sy;
            nx.edgeCount += ny.edgeCount + 1;
        }
        (Verticals[y], Verticals[x]) = (ny, nx);
        return x;
    }

    public int Find(int x)
    {
        var pid = Verticals[x].parent;
        if (pid < 0) return x;
        var aid = Find(pid);
        if (!EnabledUndo) Verticals[x].parent = aid;
        return aid;
    }
    public int Size(int x) => -Verticals[Find(x)].parent;
    public int EdgeCount(int x) => Verticals[Find(x)].edgeCount;

    public bool Undo()
    {
        if (!EnabledUndo || Histories.Count == 0) return false;
        for (var i = 0; i < 2; i++)
        {
            var (v, h) = Histories.Pop();
            Verticals[v] = h;
        }
        return true;
    }
}

static class Extensions
{
    public static T[] Repeat<T>(this int time, Func<T> F) => Enumerable.Range(0, time).Select(_ => F()).ToArray();

}

class AtCoder
{
    object? Solve()
    {
        var h = Int();
        var w = Int();
        var g = new char[h, w];
        for (var i = 0; i < h; i++)
        {
            var str = String().AsSpan();
            for (var j = 0; j < w; j++) g[i, j] = str[j];
        }

        var s = h * w;
        var uf = new UnionFind(s);
        int ID(int x, int y) => y + x * w;
        var moves = new[]{ (-1, 0), (0, -1), (0, 1), (1, 0) };
        bool Inside(int x, int y) => 0 <= x && x < h && 0 <= y && y < w;
        for (var i = 0; i < h; i++) for (var j = 0; j < w; j++)
        {
            var id = ID(i, j);
            var c = g[i, j];
            if (c == '.') continue;
            foreach (var (dx, dy) in moves)
            {
                var ni = i + dx;
                var nj = j + dy;
                if (!Inside(ni, nj) || g[ni, nj] != c) continue;
                var nid = ID(ni, nj);
                uf.Union(id, nid);
            }
        }
        for (var i = 0; i < h; i++) 
        {
            var row = new char[w];
            for (var j = 0; j < w; j++)
            {
                var id = ID(i, j);
                if (uf.Size(id) >= 4) row[j] = '.';
                else row[j] = g[i, j];
            }
            Out(new string(row));
        }
        return null;
    }

    public static void Main() => new AtCoder().Run();
    public void Run()
    {
        var res = Solve();
        if (res != null)
        {
            if (res is bool yes) res = yes ? "Yes" : "No";
            sw.WriteLine(res);
        }
        sw.Flush();
    }

    string[] input = Array.Empty<string>();
    int iter = 0;
    readonly StreamWriter sw = new(Console.OpenStandardOutput()) { AutoFlush = false };

    string String()
    {
        while (iter >= input.Length) (input, iter) = (Console.ReadLine()!.Split(' '), 0);
        return input[iter++];
    }
    T Input<T>() where T : IParsable<T> => T.Parse(String(), null);
    int Int() => Input<int>();
    void Out(object? x, string? separator = null)
    {
        separator ??= Environment.NewLine;
        if (x is System.Collections.IEnumerable obj and not string)
        {
            var firstLine = true;
            foreach (var item in obj)
            {
                if (!firstLine) sw.Write(separator);
                firstLine = false;
                sw.Write(item);
            }
        }
        else sw.Write(x);
        sw.WriteLine();
    }
}